Fire detection system with increased electromagnetic hindrances resistance [Tyt.równol.]

There is a description of the optical scheme of the laser fibre-optical smoke detector that provides increased electromagnetic fields stability in the fire alarm system using it as a fire detecting facility. Smoke detection by means of this detector is realized according to the radiation receiver reaction to the reduction of the light flux intensity registered by this receiver owing to partial absorption and dispersion on smoke particles. High noise immunity of the fire alarm system with the laser fibre-optical smoke detector is caused by the absence of the long electrically conducting supply and communication lines inputted to the detector from the receiving-monitoring device. Supply and communication lines play a part of the effective receiving aerials of the casual electromagnetic fields. Approbation results of the working capacity of the offered scheme are represented

INFLUENCE OF LOW-VOLTAGE ELECTRIC ENERGY ON FORMING OF SLAGS CHARACTERISTICS AT CASTING OF METAL IN CONVERTER

The considerable influence of electric effect on viscosity, surface tension and electrical conduction of the slag is determined and also the dependence of the character of these characteristics change on potential polarity is revealed

About the using of capacitive energy storages in the frequency-controlled electric drives

The report describes the possibility of application the ultracapacitors in the widely used frequency-controlled electric drives. The energy efficiency estimation of using the ultracapacitors in the different purposes electric drives is described. The theoretical and experimental investigation results for electric drives with capacitive energy storage are shown. © 2012 IEEE

Communication culture of medical institutions and patients as the factor of maintenance of efficiency of medical aid

Article is devoted communication culture medical establishments and patients as to the factor of maintenance of efficiency of medical aid. Authors on the basis of studying of communication culture of medical institutions and patients a different profile conclusions about necessity of management of this phenomenon on the basis of the complex approach become